Measurement of multiple switching current components through a bulk decoupling capacitor using a lab-made low-cost current probe

Li, Liang; Kim, Jingook; Wang, Hanfeng; Wu, Songping; Takita, Yuzo; Takeuchi, Hayato; Araki, Kiyomichi; Fan, Jun

doi:10.1109/isemc.2011.6038347

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…7. As explained in [12] and [15], four current pulse components with different rise times are measured at the local and bulk decoupling capacitors on a prototype PDN. The measured peak values and rise times of the four current components are summarized in Table I.…”

Section: Application Of Target Impedance In Pdn Design Of a Handmentioning

confidence: 99%

Improved Target Impedance for Power Distribution Network Design With Power Traces Based on Rigorous Transient Analysis in a Handheld Device

Kim

Takita

Araki

et al. 2013

IEEE Trans. Compon., Packag. Manufact. Technol.

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The concept of target impedance can be significantly improved, based on the rigorous closed-form expressions for transient supply voltage ripple excited by an integrated circuit (IC) switching current, for the power distribution network (PDN) with power traces that is commonly used in handheld devices. A systematic procedure for developing the target impedance is formulated, which is then applied to the PDN design of a handheld product. From measurements of transient IC switching currents, PDN impedance, and supply voltage ripple, it is shown that the proposed target impedance successfully correlates the PDN impedance in the frequency domain with the transient supply voltage ripple in the time domain.

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Section: Application Of Target Impedance In Pdn Design Of a Handmentioning

confidence: 99%

Improved Target Impedance for Power Distribution Network Design With Power Traces Based on Rigorous Transient Analysis in a Handheld Device

Kim

Takita

Araki

et al. 2013

IEEE Trans. Compon., Packag. Manufact. Technol.

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“…In most cases, however, IC information is not available for most printed circuit board (PCB) engineers due to intellectual property issues. For practical applications, direct measurement methods have been proposed using a magnetic loop probe to obtain IC switching current served by a decoupling capacitor or a bulk capacitor. These methods can only describe the charges supplied by a corresponding capacitor and cannot consider the charges served by an on‐die‐capacitance (ODC) of an IC.…”

Section: Introductionmentioning

confidence: 99%

Accurate IC current extraction method and power distribution network optimization

Lim

Lee

et al. 2015

Micro & Optical Tech Letters

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Obtaining correct integrated circuit (IC) current information is a key factor for power distribution network design. This letter suggests an exact IC current extraction method using a measured voltage of a board when detailed IC data cannot be accessible. Voltage waveform is measured at the closest decoupling capacitor position from an IC after the capacitor is eliminated. Using the measured voltage and new transfer function which eliminates oscilloscope probe noise effect, we are able to calculate an exact IC current. The proposed methodology is validated by comparing the simulated noise voltage with the real measured noise voltage of 1.2 V core circuit. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2175–2182, 2015

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“…Measurement-based methods thus are desirable in this case for practical engineering applications. Switching currents can be directly measured using the zero-Ohm method [3], using a magnetic loop probe [4], [5], or a giant magneto-impedance (GMI) probe [6]. These direct methods can only measure the current of a single power or ground pin of the IC under study.…”

Section: Introductionmentioning

confidence: 99%

Switching-current measurement for multiple ICs sharing a common power island structure

Hwang

Wang

et al. 2012

2012 IEEE International Symposium on Electromagnetic Compatibility

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Switching currents in active integrated circuits (ICs) generate noise in the power distribution network (PDN), which is one of the main sources for many signal/power integrity and electromagnetic interference issues in high-speed electronic devices. Accurate knowledge of the switching currents is the key to ensure a good PDN design. This paper proposes a measurement methodology, when IC information is not available, to obtain the equivalent switching current of each IC in the case where multiple ICs are connected to a common power island structure. Time-domain oscilloscope measurements are used to capture the noise-voltage waveforms at a few locations in the power island. Combining with the multi-port frequency-domain S-parameter measurement among the same locations, an equivalent switching current for each IC is calculated. The proposed method is validated at a different location in the power island by comparing the calculated noise voltage using the equivalent switching currents as excitations with the actual measured noise voltage.

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Measurement of multiple switching current components through a bulk decoupling capacitor using a lab-made low-cost current probe

Cited by 4 publications

References 7 publications

Improved Target Impedance for Power Distribution Network Design With Power Traces Based on Rigorous Transient Analysis in a Handheld Device

Improved Target Impedance for Power Distribution Network Design With Power Traces Based on Rigorous Transient Analysis in a Handheld Device

Accurate IC current extraction method and power distribution network optimization

Switching-current measurement for multiple ICs sharing a common power island structure

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